Which pair of states were created in 1966?

Punjab and Haryana

Gujarat and Maharashtra were formed in 1960.
Punjab and Haryana were formed in 1966.
Andra Pradesh and Karnataka were formed in 1956.
Chattisgarh and Jharkhand were formed in 2000.

In Punjab there were two linguistic groups: Hindi speaking and Punjabi speaking. The Punjabi speaking people demanded a separate state. But it was not granted with other states in 1956. Statehood for Punjab came ten years later, in 1966, when the territories of today’s Haryana and Himachal Pradesh were separated from the larger Punjab state.